4 : 8
x 9 => 36 : 72 <=== equivalent
The gcf of 36 and 48 is 12
We start with
$1,187.92
With the interest and the late fee charge
$1,187.92 (1 + 0.1225/12) + 30 = $1,230.05
With the interest minus the payment of $125
$1,230.05 (1 + 0.1225/12) - $125 = $1,117.60
The new principal after the latest payment is $1,117.60.
The best answer would be
2.4 x 10 ^6
10 to the sixth power multiplied by 2.4